bracket vs bracket out

bracket is a noun but bracket out is not a noun.

Word	Noun	Adjective	Verb	Adverb
bracket	Yes	No	Yes	No
bracket out	No	No	Yes	No

As verbs, bracket and bracket out are synonyms defined as:

bracket (noun)	bracket out (noun)
a support projecting from a wall (as to hold a shelf)
either of two punctuation marks ([ or ]) used to enclose textual material
either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material
a category falling within certain defined limits